1,721,021 research outputs found
Analysis of the chemical constituents and micromorphology of Bauhinia scandens using SEM-EDS techniques
Get PDFLianah L, Idris F, Krisantini K. 2019. Short Communication: Analysis of the chemical constituents and micromorphology of Bauhinia scandens using SEM-EDS techniques. Biodiversitas 20: 2055-2060. Some species of Bauhinia had a medicinal efficacy however the specific studies of Bauhinia scandens Willd. are relatively limited. Therefore this study analyzed the material and micromorphological characteristics of leaves, stems and roots of B. scandens using scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) to quantitatively assess the elements and explore its potential uses. Samples of fresh plant were taken from five locations in Indonesia, and the results showed similar snake-like stem morphology from two locations, while pilot ladder-like stem morphology was observed from the other three locations. The material analysis revealed the presence of carbon, oxygen, silicon, potassium, indium, tellurium, aluminum and iron in the samples. Interestingly, the stems did not contain indium and aluminum whereas iron were only found in the roots. Furthermore, the young leaves did not contain tellurium and silicon. The presence of indium which is potential as a cancer drug in B. scandens suggests promising uses of the plant for herbal medicines
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Control of fusarium wilt of banana by using Trichoderma harzianum and resistant banana cultivars
No full textFusarium wilt caused by Fusarium oxysporum f. sp. cubense (Foc) is one the most damaging diseases of banana. The disease has spread throughout all banana growing areas in Indonesia. No effective control method is available to overcome the disease. This research was conducted to study the ability of two Trichoderma harzianum isolates, TH UH and TH13, and resistant banana cultivars to control fusarium wilt disease both in the glasshouse and in a field trial. Four banana cultivars were used in this study, i.e., 'PisangPanjang', 'KepokKuning', 'Puju' and 'Barangan'. An in vitro trial showed that T. harzianum isolates TH UH and TH 13 could inhibit the growth of tropical race 4 of the Foc isolate Bnt2. However, Foc inoculated banana seedlings treated with T. harzianum TH UH and TH 13 did not show any reduced disease intensity in the glasshouse trial. After 14 months of observations in a field trial, the disease only occurred in the banana cultivar 'Barangan' treated with T. harzianum and in the untreated control. The disease did not appear in the cultivars 'PisangPanjang', 'KepokKuning' and 'Puju' treated with T. harzianum or in the untreated controls. The results suggest that T. harzianum is not effective in controlling fusarium wilt of banana and only resistant banana cultivars such as 'PisangPanjang', 'KepokKuning' and 'Puju' can be cultivated to tolerate the disease. This research was funded by ACIAR CP2004/034
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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